Filter control valve



Nov. 28, 1950 o. A. MAUNULA 2,532,177

' FILTER CONTROL VALVE Filed June 23, 1948 5 Sheets-Sheet l M 7? aflllfaunuz z *MQ QM Nov. 28, 1950 o. A. MAUNULA 2,532,177

FILTER CONTROL VALVE Filed June 23, 1948 5 Sheets-Sheet 2 55 QflMaunuZa MvM Nov. 28, 1950 o. A. MAUNULA 2,532,177

FILTER CONTROL VALVE Filed June 25, 1948 s Sheets-Sheet 3 1 MW V QflMzunuZa Nov. 28, 1950 o. A. MAUNULA 2,532,177 FILTER CONTROL VALVE Filed June 23, 1948 5 Sheets-Sheet 4 i$i\ 6 4" w 3 W 6/ 59 6 Qflllfaunzdw Nov. 28, 1950 o. A. MAUNULA 2,532,177

FILTER CONTROL VALVE Filed June 23, 1948 5 Sheets-Sheet 5 "2/ w I A I uZa Patented Nov Ed, Wfid Emmi FILTER (JUNTltlUrL VALVE Otto A. Maunula, Palo Alto, Calif.

dpplication .llune 23, 19%, Serial No 3i,62l

4 Claims.

This invention relates to oil or other liquid filters, and is an improvement over the construction embodied in my prior Patent No. 1,750,935, issued March 18, 1930, for Oil Filter,

An object of this invention is to provide an oil or liquid filter which can be used on a pressure line and includes safety means whereby the filter unit will be protected against distortion under increased pressure.

Another object of this invention is to provide a filter which can be cleaned and drained with facility and which includes means whereby the filter unit may be by-passed when desired.

A further object of this invention is to provide a filter of this kind wherein the regulating and draining valves are connected together for operation by a single lever or handle.

With the above and other objects in view, my invention consists in the arrangement, combination and details of construction disclosed in the drawings and specification, and then more particularly pointed out in the appended claims.

In the drawings,

Figure 1 is a plan view of a filter constructed according to an embodiment of this invention,

Figure 2 is a detail side elevation partly broken away and in section of the device,

Figure 3 is a fragmentary sectional view taken on the line 3-3 of Figure 1,

Figure 4 is a fragmentary sectional view taken on the line t-t of Figure 1,

Figure 5 is a fragmentary sectional view taken on the line t-t of Figure 1, y I

Figure 6 is a sectional view taken on the line li-t of Figure 5,

Figure 7 is a sectional view taken on the line 'l-l of Figure 5,

Figure 8 is a sectional view taken on the line t-t of Figure a,

Figure 9 is a fragmentary sectional view taken on the line il-il of Figure l,

Figure 10 is a top plan view of the splash cup,

Figure 11 is a sectional view taken on the line ll--ll of Figure l.

Referring to the drawings, the numeral I5 designates generally an outer housing of generally cylindrical configuration which is formed with a conical lower end it forming a combined distributing and settling'chamber H. The housing it has secured to the upper end thereof a fianged ring it on which a head plate or membe I9 is secured by fastening devices 20. A valve structure generally designated as 2i is dependingly mounted within the housinglfiand comprises a vertically disposedbody 22 having secured to the chamber ti which communicates with an upper 2 upper end thereof a plate 23 which is secured to the upper side of the head plate [9.

The body 22 is formed with an elongated tapered valve seat 2d Within which a multi-ported valve plug 25 is rotatably mounted. The body 2'2 is formed with an intake port 26 communicating; with an intake chamber 21 within which an in-- take pipe 28 is adapted to be connected. The port 26 confronts an intake port 29 formed in the lower portion of the plug 25, which is adapted to be disposed in registry with intake port 26 and also with an outlet port til also formed in the body it.

The body 22 includes an outlet chamber 3! with which the port 3d communicates and a depending pipe 32 is connected at its upper end to the cha1nber ii for communicating the fluid to the distributing and settling chamber ll. The body 22 also includes a passage 33 which communicates the inlet chamber 27 with the outlet chamber 3!] through a check valve seat 35 which is normally closed by a downwardly closing ball check valve 36.

The body 22 also has secured thereto a return return passage or port til formed in the plug 25 above the port 29. The body 22 is formed with a return port 39 communicating the return chamber 37 with a diametrically disposed return port 40 also formed in the body 22. The body 22 has secured thereto a by-pass chamber ll communicating chamber 33 with return chamber 3i.

A valve seat i2 is disposed between chamber 33 and chamber ti and is normally closed by a down wardly closing safety valve l -i normally held on seat ti by means of a spring M. The safety valve it includes an upwardly extending stem d5 slidable in a guide M which is carried by a screw plug ii threaded through the top plate 23.

Theplug ill also constitutes a means for tensioning the spring M. The check valve 36 is disposed directly below the safety valve it and a stop member 34 in the form of a bolt extends across the chamber 33 aslight distance above the check valve 36 to limit the upward movement of this valve when moved to open position.

The body 22 also has secured thereto an air pressure chamber 48 which is disposed between the two chambers 21 and El and communicates with the upper return port 38 of plug 25 when the latter is turned so that port 38 will register with port 49, communicating with air pressure chamber 48. When plug 25 is turned to communicate port 38 with port 49, port 38 will also communicate with port Mi so that air under pressure 3 will be discharged interiorly of a cylindrical filter element 50 which is disposed loosely and in spaced relation about the valve structure iii.

A baiile 5| is carried by the chamber 33 in a position confronting port 40 so as to deflect the air which is being discharged from port 40. The filter 50 which is of cylindrical configuration has disposed on the inner side thereof a reinforcing wire mesh 52 and also has disposed on the outer side thereof an outer wire mesh reinforcing member 53. A plate 54 engages against the lower end or the filter element 50 and provides a dividing means whereby the fluid which is discharged through the lower end of the pipe 32 will be required to flow outwardly of the lower side of plate 54 and then upwardly between filter 50 and housing i 5.

The plate 54 is formed with a. downwardly extending bushing 55 on which is threaded a splash cup 56. The cup 56 is directed upwardly and is disposed below the lower end of the pipe 32, being sealed with respect to the bushing 55 by means of a'sealing member 51. The plate 54 is formed with a drain bushing 01' seat 59 within which a tapered drain valve 66 is rotatably mounted. The bushing or seat 59 is formed with a pair of diametrically disposed ports 6! (as shown in Figure 8), so that fluid in inner chamber 62 which is positioned on the inside or element 50 may be drained from the lower portion of the chamber 62.

The valve plug 60 is formed with a central bore 63 and a pair of lateral ports 64 adapted upon rotation of plug 65 in one direction to be disposed in registry with ports 6|. An upwardly extending stem 65 is carried by the plug 60 and is formed with a vertically disposed slot 66 within which a coupling link 6'! is adapted to be slidingly mounted.

A pin 68 extends through the lower portion of link 51 and loosely engages in a pair of vertically disposed slots 69 formed in the stem 65 so that plug 60 may have relative endwise movement with respect to link 61. The upper end of link 61 is secured to a downwardly extending stem 75 formed on the upper or main plug 25, the latter being formed with a slot H within which the link 51 is secured. A spring l2 engages about the lower portion of link 61 and also engages about stem 65, bearing at its lower and against the upper large end of tapered plug 60. The upper end of spring 12 bears against a pin or bolt 13 which extends through link 61 so that spring 72 will constantly urge both plugs 25 and 50 onto their respective seats. The main plug 25 also includes an upper stem I4 extending above the top plate 23 and on which an operating handle is adapted to be secured. A gland l6 seals the upper stem or stud 14 with respect to the plate 23.

The plate 23 has a pipe 1'! extending therethrough and a conventional pressure gauge is adapted to be mounted on pipe 11. An air pressure pipe 18 is adapted to be secured to plate 23 for communicating air chamber 48 with a source of air pressure supply.

The distributing and settling chamber I! has connected therewith a drain valve 79 so that the settlings in chamber I! may be drained therefrom at the time valve plug 60 is turned to draining position.

In the use and operation of this device, the inlet chamber 21 is connected to a source of fluid supply and the return chamber 31 is connected to the return line of the fluid. In normal operation valve plug 25 will be turned to the positions shown in Figures 6 and '7. The fluid will flow from chamber 21 through port 26, port 29 and port 35, into outlet chamber 3|. The fluid will then flow down through pipe 32 into the distributing and settling chamber l1 and will rise upwardly on the outer side of the filter 50. The fluid will return into chamber 62 through filter 50 and will then pass through return passage 40 of body 22, return passage 38 of plug 25, and return passage 38 into return chamber 31. At the time the filter is in normal use, drain valve plug 50 will be in closed position.

When it is desired to drain the filter structure. operating lever or handle 15 is turned to rotate plug 25 in valve body 22 so that port 26 will register with port 80 formed in the plug for communication with port 8| and closing port 30 to permit oil to by-pass the filter, and at the same operation plug 50 is caused to rotate in body 59 so as to communicate ports 64 with ports 6|. In the event the pressure in chamber 33 is above a predetermined maximum, valve 43 will be moved upwardly to open position so that the fluid will flow from chamber or passage 33 to by-pass chamber or passage 4|. At the same time check valve 36 may also be moved upwardly to open position so as to relieve pressure in outlet chamber 3|.

When it is desired to clean the filter structure, operating lever or handle 15 is turned to rotate plug 25 so that port 26 will remain in communication with port 8| to permit oil to by-pass the filter and to place air port 49 in communication with port 40 through port 38 in plug 25, and at the same time rotate plug 60 in body 55 so that the ports 64 formed therein are out o! communication with ports 5| in body 59. This permits the filter to be cleaned and drained while oil is fiowing through the system.

In the event there is excessive pressure in lower chamber I1 below plate 54, this pressure is relieved by upward movement of valve plug 60 which will communicate chamber I! with chamber 62.

I do not mean to confined myself to the exact details of construction herein disclosed, but claim all variations falling within the purview oi the appended claims.

What I claim is:

l. A filter comprising a cylindrical housing, a head secured to the upper end of said housing, a

valve body dependingly carried by said head, said body having a central elongated valve seat, a.

multi-ported plug engaging said seat, said body having an inlet passage communicating with one of said plug ports and a return passage communicating with another of said plug ports, inlet conduit means connected to said body and communicating with said inlet passage, return conduit means connected to said body and communicating with said return passage, said body having a by-pass passage communicating said inlet passage with said return passage, a normally closed spring-pressed safety valve between said by-pass passage and said inlet passage, a cylindrical filter element in said housing about said body, a lower plate engaging and closing the lower end of said element, said body having an outlet chamber communicating with said one plug port, a pipe communicating said chamber with the space below said plate, an upwardly directed splash cup carried by said pipe below said plate, a drain valve plug carried by said plate, and means connecting said drain plug with said first named plug for operation thereby.

2. A filter comprising a cylindrical housing, a head secured to the upper end of said housing, a valve body dependingly carried by said head, said body having a central elongated valve seat, a multi-ported plug engaging said seat, said body having an inlet passage communicatingwith one of said plug ports and a return passage communicating with another of said plug ports, inlet conduit :means connected to said body and communicating with said inlet passage, return conduit means connected to said body and communicating with said return passage, said body having a by-pass passage communicating said inlet passage with said return passage, a normally closed spring-pressed safety valve between said by-pass passage and said inlet passage, a cylindrical filter element in said housing about said body, a lower plate engaging and closing the lower end of said element, said body having an outlet chamber communicating with said one plug port, a pipe communicating said chamber with the space below said plate, an upwardly directed splash cup carried by said pipe below said plate, a drain valve seat carried by said plate, a drain plug engaging said socket, and means connecting said plugs together.

3. A filter comprising a cylindrical housing, a head secured to the upper end of said housing, a valve body dependingly carried by said head, said body having a central elongated valve seat, a multi-ported plug engaging said seat, said body having an inlet passage communicating with one of said plug ports and a return passage communicating with another of said plug ports, inlet conduit means connected to said body and communicating with said inlet passage, return conduit means connected to said body and communicating with said return passage, said body having a by-pass passage communicating said inlet passage with said return passage, a normally closed spring-pressed safety valve between said by-pass passage and said inlet passage, cylindrical filter element in said housing about said body, a lower plate engaging and closing the lower end of said element, said body having an outlet chamber communicating with said one plug port, a pipe communicating said chamber with the space below said plate, an upwardly directed splash cup carried by said pipe below said plate, a drain valve seat carried by said plate, a drain plug engaging said seat, a loose coupling between said plugs, and a spring about said coupling constantly urging said plugs toward their respective seats.

4. A filter comprising a cylindrical housing, a head secured to the upper end of said housing, a valve body dependingly carried by said head, said body having a central elongated valve seat, a multi-ported plug engaging said seat, said body having an inlet passage communicating with one of said plug ports and a return passage communicating with another of said plug ports, inlet conduit means connected to said body and communicating with said inlet passage, return conduit means connected to said body and communicating with said return passage, said body having a by-pass passage communicating said inlet passage with said return passage, a normally closed spring-pressed safety valve between said by-pass passage and said inlet passage, a downwardly closing check valve between said by-pass passage and said outlet chamber, a cylindrical filter element in said housing about said body, a lower plate engaging and closing the lower end of said element, said body having an outlet chamber communicating with said one plug port, and means communicating said chamber with the space below said plate whereby the fluid will be discharged into said housing below said plate for passage through said element and into said return passage.

O'I'IO A. MAUNULA.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 98,503 Johnson Jan. 4, 1870 226,249 Scannell et a1. Apr. 6, 1880 230,347 Scannell et al July 20, 1880 282,313 Haynes July 31, 1883 603,834 Sprague May 10, 1898 1,062,236 Hitchcock May 20, 1913 1,270,162 Jay June 18, 1918 1,539,910 Parish June 2, 1925 1,750,935 Maunula Mar. 18, 1930 1,822,006 Bull Sept. 8, 1931 

